Mana-chan's portio, said to be the strongest erogenous zone, is being developed for the first time. Although she is confused by the unexperienced sexual sensations that slowly well up from the depths of her vagina, she is completely captivated by the exquisite pleasure that runs through her entire body. The portio is simultaneously stimulated from inside and outside, and the double stimulation of the portio and G-spot makes her arch her back and scream in agony! She exposes her overwhelmingly lewd behavior in an endless climax loop!